lan9220 Standard Microsystems Corp., lan9220 Datasheet - Page 14

• Manufacturer Part Number: lan9220
• Description: 16-bit Non-pci Small Form Factor 10/100 Ethernet Controller With Variable Voltage I/o & Hp Auto-mdix Support
• Manufacturer: Standard Microsystems Corp.

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
Datasheet
1.11
Host Bus Interface (SRAM Interface)
The host bus interface provides a FIFO interface for the transmit and receive data paths, as well as
an interface for the LAN9220 Control and Status Registers (CSR’s).
The host bus interface is the primary bus for connection to the embedded host system. This interface
models an asynchronous SRAM. TX FIFO, RX FIFO, and CSR’s are accessed through this interface.
Programmed I/O transactions are supported.
The LAN9220 host bus interface supports 16-bit bus transfers. Internally, all data paths are 32-bits
wide. The LAN9220 can be interfaced to either Big-Endian or Little-Endian processors and includes
mixed endian support for FIFO accesses.
14
Revision 2.6 (12-04-08)
SMSC LAN9220
DATASHEET